Malicious PDF — malware analysis report

Static analysis result for SHA-256 c42dfb78881c2535…

MALICIOUS

PDF

109.5 KB Created: 2020-12-31 10:48:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4e5fee985b4f5e9169b516d3292bcb75 SHA-1: 12419ca4719e5f07cb15c5873a73c8399e0846f9 SHA-256: c42dfb78881c253551a553f4623150614ec0dd786b960133faf94a5d68e83685
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffking.ru/strik?utm_term=wow+classic+invaders+of+alterac+valley PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5fa49926c4e96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381748/normal_5fca2790c63e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451940/normal_5fba02667f198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394061/normal_5f8ec36dd5dbd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413980/normal_5febff06adf41.pdfIn PDF document text
    • https://kuxiwidozerapi.weebly.com/uploads/1/3/4/7/134728536/052163c0769473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420260/normal_5fbd45457bea0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ded325-e10d-4b79-831f-a6320d5763ad/pokemon_giratina_and_the_sky_warrior_full_movie_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7b8dd29-be60-4664-9aec-aaf54dd31187/swann_srdvr_88075h_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5030dbbf-946e-42d1-aefb-c75f043b704b/25327062201.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/46069133059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d5f1781-b71f-4b5d-8ce4-db1b5a4241ab/xifevimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be6257c7-1b6a-4746-a575-603ce39137a7/97025244818.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531ff4bf-8e76-45dd-b9e2-47374fc22f10/59433778653.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/23555792384.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001706a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1706A 5284 bytes
SHA-256: 829b2a62fa802150c9f6fbeb6da10e481c3b1421a64db0be8acbb38df51c7211
font_01_sfnt_off00018290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18290 11236 bytes
SHA-256: 1aadfc376ef4bb9919eb4ffcc5b6ff7c7a12278e3262eb0015debca701b8a00c

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